Harmonica



FIG. 1 is a perspective view of a harmonica showing the top, front and left sides of my new design;

FIG. 2 is a front view of the harmonica;

FIG. 3 is a left side elevational view of the harmonica;

FIG. 4 is right side elevational view of the harmonica;

FIG. 5 is a top plan view of the harmonica;

FIG. 6 is a bottom plan view of the harmonica; and,

FIG. 7 is a rear view of the harmonica. 

The ornamental design for a harmonica, as shown and described. 